The present invention relates to novel active alkynyl-substituted n-phenyl-pyrrolidine-2,4-diones according toformula (I), or to agrochemically acceptable salts thereof, where X = C 1-C4alkyl, C1-C4 haloalkyl, or C3-C6 cycloalkyl, Y = C1-C4alkyl, or C3-C6 cycloalkyl, R1 = hydrogen, C1-C6 alkyl, or C3-C6 cycloalkyl,R2 = hydrogen or methyl, R3 = C1-C6 alkyl, orC1-C6-alkoxy-C2-C6 alkyl, G = hydrogen, a splittable group L, or a cation E.The invention also relates to a herbicidal compositioncomprising a compound of general formula (I) and to the use of the compoundsaccording to the invention for controlling weeds andweed grasses in commercial crop cultivation.
